udhcpc: support option 0x79 (static routes) (part of bug 341)

function                                             old     new   delta
xmalloc_optname_optval                                 -     583    +583
dhcp_option_strings                                  258     266      +8
dhcp_options                                          70      72      +2
len_of_option_as_string                               11      12      +1
dhcp_option_lengths                                   11      12      +1
udhcp_run_script                                    1187     669    -518
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/1 up/down: 595/-518)           Total: 77 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c
index 76d6e3737..ddb894432 100644
--- a/networking/udhcp/options.c
+++ b/networking/udhcp/options.c
@@ -48,6 +48,7 @@ const struct dhcp_option dhcp_options[] = {
 #if ENABLE_FEATURE_UDHCP_RFC3397
         { OPTION_STR1035 | OPTION_LIST            , 0x77 }, /* search             */
 #endif
+        { OPTION_STATIC_ROUTES                    , 0x79 }, /* DHCP_STATIC_ROUTES */
         /* MSIE's "Web Proxy Autodiscovery Protocol" support */
         { OPTION_STRING                           , 0xfc }, /* wpad               */
 
@@ -97,6 +98,7 @@ const char dhcp_option_strings[] ALIGN1 =
 #if ENABLE_FEATURE_UDHCP_RFC3397
         "search" "\0"
 #endif
+        "staticroutes" "\0" /* DHCP_STATIC_ROUTES  */
         /* MSIE's "Web Proxy Autodiscovery Protocol" support */
         "wpad" "\0"
         ;
@@ -116,6 +118,8 @@ const uint8_t dhcp_option_lengths[] ALIGN1 = {
         [OPTION_S16] =     2,
         [OPTION_U32] =     4,
         [OPTION_S32] =     4,
+        /* Just like OPTION_STRING, we use minimum length here */
+        [OPTION_STATIC_ROUTES] = 5,
 };